Author Question: In the unified model of active galactic nuclei, the broad line region in an active galactic nucleus ... (Read 67 times)

Mimi · **on:** Jul 27, 2018

In the unified model of active galactic nuclei, the broad line region in an active galactic nucleus is

a. composed of clouds of gas and stars moving at very high orbital velocities near a supermassive black hole.
b. composed of a supermassive black hole surrounded by empty space.
c. responsible for producing the bright continuous radiation from within the event horizon.
d. responsible for the narrow absorption lines seen in Type 2 Seyfert galaxies.
e. located far from the core beyond the disk of stars of the galaxy.

Question 2

The Chandrasekhar limit tells us that

a. accretion disks can grow hot through friction.
b. neutron stars of more than 3 solar masses are not stable.
c. white dwarfs more massive than 1.4 solar masses are not stable.
d. stars cannot travel through space too fast.
e. stars with a mass less than 0.5 solar masses will not go through helium flash.